These animals are all used to their environment,______, they have learned how to live successfully in their habitat．

Was it in April, 1970China succeeded sending its first satellite into space? —Yes, that’s right.

Your car should be ready by 12 o’clock, but ___, I’lllet you know.

There abasketball match between Class One and Class Three this afternoon.

The new education system is said to be _______ to the successful development of the country.